Title:
RETARDATION FILM, POLARIZING PLATE USING SAME, AND LIQUID CRYSTAL DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2012/026199
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide: a retardation film which uses a low-substituted cellulose ester and has improved retardation after saponification and improved wet heat stability of internal haze; a polarizing plate which uses the retardation film; and a liquid crystal display device.
An optical film of the present invention contains a cellulose ester and a compound represented by general formula (1), and is characterized in that the compound has an average degree of substitution within the range of 3.0-6.0 and contains a component having a degree of substitution of 4 or less in an amount of 30-80% by mass (inclusive).
(In the formula, R1-R8 each represents a substituted or unsubstituted alkylcarbonyl group or a substituted or unsubstituted allylcarbonyl group, and R1-R8 may be the same as or different from one another.)
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Inventors:
SERA TAKASHI (JP)
TAKAGI TAKAHIRO (JP)
INAGAKI AYAKO (JP)
OKA SHIGEKI (JP)
TAKAGI TAKAHIRO (JP)
INAGAKI AYAKO (JP)
OKA SHIGEKI (JP)
Application Number:
PCT/JP2011/064381
Publication Date:
March 01, 2012
Filing Date:
June 23, 2011
Export Citation:
Assignee:
KONICA MINOLTA OPTO INC (JP)
SERA TAKASHI (JP)
TAKAGI TAKAHIRO (JP)
INAGAKI AYAKO (JP)
OKA SHIGEKI (JP)
SERA TAKASHI (JP)
TAKAGI TAKAHIRO (JP)
INAGAKI AYAKO (JP)
OKA SHIGEKI (JP)
International Classes:
C08J5/18; G02B5/30; G02F1/1335; G02F1/13363
Domestic Patent References:
| WO2009011228A1 | 2009-01-22 |
Foreign References:
| JP2009286931A | 2009-12-10 |
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Claims: